package com.edu.mapper;

import com.edu.bean.User;

import java.util.List;

/*
 * @Author:mx
 * @Date:2025/10/13-10:58:31
 */
public interface UserMapper {

    /*
    *   嵌套结果
    * */
    User selectUserById(int userId);

    List<User> selectAll();


    /*
    *   嵌套查询
    * */
    User selectUserById2(int userId);

}
